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    <title>Document</title>
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    <script>
    //1.将数组map，filter，reduce，every改写成箭头函数形式
        //const arr1 = arr.map(
            //function (element) {
                //return element + 1
            //}
        //)
        const arr = [1, 2, 3, 4, 5, 6]
        var map = map() => {
            function (element) {
                return element + 1
            }
        }

        // const new_arr = arr.filter(
        //     function (e){
        //         return e%2==0  //true：返回 false：不符合条件=>过滤
        //     }
        // )
        var fil = filter() => {
            function (e){
                 return e%2==0
             }
        }

        // var sum = arr.reduceRight(
        //     function (v1,v2){
        //         return v1*v2
        //     }
        // )
        var sum = reduce() => {
           function (v1,v2){
                 return v1*v2
             } 
        }

        // var isMatch = arr.every(
        //     function (e){
        //         return e>1
        //     }
        // )
        var every = every() => {
            function (e){
                 return e>1
             }
        } 
    
    </script>
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